<template>
	<el-breadcrumb class="app-breadcrumb" separator="/">
		<transition-group name="breadcrumb">
			<el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
				<span v-if="item.redirect === 'noRedirect' || index == levelList.length - 1" class="no-redirect">
					<template v-for="(item_1, index_1) in item.meta.title">
						<span v-if="languageId === item_1.langId">{{ item_1.name }}</span>
					</template>
				</span>
				<span v-else :class="{ no_active: index === 0 }">
					<template v-for="(item_1, index_1) in item.meta.title">
						<span v-if="languageId === item_1.langId">{{ item_1.name }}</span>
					</template>
				</span>
			</el-breadcrumb-item>
		</transition-group>
	</el-breadcrumb>
</template>

<script>
import pathToRegexp from 'path-to-regexp';

export default {
	data() {
		return {
			levelList: null
		}
	},
	computed: {
		languageId() {
			// 固定语种ID  1:中文  2:英文 3:俄文 4:乌语
			return this.$store.getters.languageId
		}
	},
	watch: {
		$route(route) {
			// if you go to the redirect page, do not update the breadcrumbs
			if (route.path.startsWith('/redirect/')) {
				return
			}
			this.getBreadcrumb()
		}
	},
	created() {
		this.getBreadcrumb()
	},
	methods: {
		getBreadcrumb() {
			// only show routes with meta.title
			const matched = this.$route.matched.filter(
				item => item.meta && item.meta.title
			)
			// const first = matched[0]

			// if (!this.isDashboard(first)) {
			//   matched = [{ path: '/', meta: { title: '首页' }}].concat(matched)
			// }

			this.levelList = matched.filter(
				item => item.meta && item.meta.title && item.meta.breadcrumb !== false
			)
		},
		isDashboard(route) {
			const name = route && route.name
			if (!name) {
				return false
			}
			return name.trim().toLocaleLowerCase() === '/'.toLocaleLowerCase()
		},
		pathCompile(path) {
			// To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
			const { params } = this.$route
			var toPath = pathToRegexp.compile(path)
			return toPath(params)
		},
		handleLink(item, index) {
			if (index) {
				const { redirect, path } = item
				if (redirect) {
					this.$router.push(redirect)
					return
				}
				this.$router.push(this.pathCompile(path))
			}
		}
	}
}
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
	display: inline-block;
	font-size: 14px;
	line-height: 50px;
	margin-left: 8px;

	.no-redirect {
		color: #97a8be;
		cursor: text;
	}

	a.no_active:hover {
		color: unset;
		cursor: unset;
	}
}
</style>
